【发布时间】：2014-06-12 23:36:36
【问题描述】：
单击按钮后，我尝试调用方法，但出现此错误： “不能对非静态方法进行静态引用”
这是代码，代码中唯一有问题的地方是当我尝试调用 reakcja();在按钮 Intencja。你能帮帮我吗？
package com.example.buttonwork;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.RatingBar;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;
public class MainActivity extends ActionBarActivity {
public void reakcja(){
Intent i = new Intent(this, Intencja.class);
startActivity(i);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.i("click", "On create!");
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
Log.i("click","Teraz chyba pierwszy zapis instancji");
}
}
@Override
public void onStop(){
Log.i("click","onStop");
super.onStop();
}
@Override
public void onPause(){
Log.i("click","onPause");
super.onPause();
}
@Override
public void onResume(){
Log.i("click","onResume");
super.onResume();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
Log.i("click","Pierwsze tworzenie menu?");
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
//Toast.makeText(item.getContext(), "elo", Toast.LENGTH_SHORT).show();
Log.i("click", "menu");
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
Button but1;
Button Intencja;
TextView tv1;
EditText et1;
Button raf,kas;
ToggleButton off;
SeekBar sk1;
int kto;
CheckBox cb1,cb2;
RatingBar rb1;
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
Log.i("click","Tutaj wszystko sie dzieje");
rb1 = (RatingBar) (rootView.findViewById(R.id.rb1));
/*rb1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(v.getContext(), String.valueOf(rb1.getProgress()), Toast.LENGTH_SHORT).show();
}
});*/
rb1.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
@Override
public void onRatingChanged(RatingBar ratingBar, float rating,
boolean fromUser) {
// TODO Auto-generated method stub
Toast.makeText(ratingBar.getContext(), String.valueOf(rating), Toast.LENGTH_SHORT).show();
}
});
Intencja = (Button) (rootView.findViewById(R.id.Intencja));
Intencja.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
reakcja();
}
});
cb1 = (CheckBox) (rootView.findViewById(R.id.cb1));
cb2 = (CheckBox) (rootView.findViewById(R.id.cb2));
off = (ToggleButton) (rootView.findViewById(R.id.toggleButton1));
off.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(v.getContext(), off.getText(), Toast.LENGTH_SHORT).show();
}
});
sk1 = (SeekBar) (rootView.findViewById(R.id.seekBar1));
sk1.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
//Toast.makeText(seekBar.getContext(), String.valueOf(progress), Toast.LENGTH_SHORT).show();
tv1.setText(String.valueOf(progress));
return;
}
});
/*sk1.setOnSeekBarChangeListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(v.getContext(), sk1.getProgress(), Toast.LENGTH_SHORT).show();
}
});*/
tv1 = (TextView) (rootView.findViewById(R.id.tv1));
et1 = (EditText) (rootView.findViewById(R.id.et1));
raf = (Button) (rootView.findViewById(R.id.button1));
raf.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(v.getContext(), "Ralfo jest miszczem", Toast.LENGTH_SHORT).show();
kto = 1;
sk1.setProgress(50);
}
});
kas = (Button) (rootView.findViewById(R.id.button2));
kas.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(v.getContext(), "Nie, to Ralfo jest miszczem", Toast.LENGTH_SHORT).show();
kto =2;
sk1.setProgress(50);
}
});
but1 = (Button) (rootView.findViewById(R.id.b1));
but1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
tv1.setText(et1.getText().toString());
Toast.makeText(v.getContext(), String.valueOf(cb1.isChecked() && cb2.isChecked()), Toast.LENGTH_SHORT).show();
// wyświetla Toasta true albo false sprawdzając CheckBoxy i robiąc na nich koniunkcję
}
});
return rootView;
}
}
}
【问题讨论】：
-
您正在从
static内部类中调用非static方法；它怎么知道要使用外部类的哪个实例？ -
顺便说一句，请不要在您的问题中发布 数百 行代码。您应该将其简化为演示问题的最简单示例。
-
感谢您重定向我，我正在关注您粘贴的问题。你能告诉我我应该怎么做才能使这个意图起作用吗？这是我使用 Intents 的第一步，我敢打赌答案很简单。谢谢你:)
标签： java android methods reference static